Narrative:

I was the first officer (first officer) on [the] flight. We landed on 31 from the expressway visual and made the T turnoff. Tower had said make the left turn off at T. I switched the radio to ground and the captain took the ground frequency while I called ramp to get clearance into the gate. After I had come back to ground frequency the captain had not gotten a word in yet as the frequency was congested and there was a lot of traffic. We were still on T at an angle to B. I checked in with ground finally and stated we were off (runway 31) and joining B. Ground said go straight ahead on bravo and hold short of G. There was an airbus making the turn from a to G. We were told to give way to airbus and then hold short of F.ground changed their mind and said airbus gives way to you; proceed on B and hold short of F. Then ground asked if we were cleared in to the gate. I stated after 2 outbound aircraft out of the alley we were cleared into the gate. They said okay go F and a and hold short of your alley until you can get in. We taxied from B and took a left on F and a second left on a and held short of the alley while a company aircraft exited the alley. After they were clear we turned right into the alley and into the gate. We followed all of these instructions as stated.upon reaching the gate; the captain received a phone call from the tower stating we did not hold short of the taxiways we were told to on the way in. We in fact held short of G when asked and also held short of F and the ramp as we were told or until we were told otherwise. The controller also said on the phone; according to the captain; that we were originally told to turn left onto B after exiting the runway. If the case; I did not hear nor read back the instruction to turn left onto bravo.I believe we followed the instructions as they were issued. Some factors though that may have contributed to any deviation that occurred according to the controllers could've been misinterpretation of the taxi instructions on our part or ATC forgetting what instructions they gave us. It was the last leg of days of work for me so fatigue was starting to set in. I could have missed an instruction issued by ground and as a result did not read back the correct instructions and was also not corrected by the controller.it is important to listen to all instructions closely as they are given and confirm them if any doubt exists. There were a number of distractions including talking to ground/tower; calling the ramp to find out the status of the gate; completing the after landing flows/checklist; and most importantly keeping a heads up awareness outside the aircraft especially in a designated hotspot.

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Original NASA ASRS Text

Title: Air carrier flight crew reported that the Tower informed them they had not followed their taxi clearance correctly. However; the flight crew believed they followed it as it was assigned by ATC.

Narrative: I was the First Officer (FO) on [the] flight. We landed on 31 from the expressway visual and made the T turnoff. Tower had said make the left turn off at T. I switched the radio to ground and the captain took the ground frequency while I called ramp to get clearance into the gate. After I had come back to ground frequency the captain had not gotten a word in yet as the frequency was congested and there was a lot of traffic. We were still on T at an angle to B. I checked in with ground finally and stated we were off (runway 31) and joining B. Ground said go straight ahead on bravo and hold short of G. There was an Airbus making the turn from A to G. We were told to give way to Airbus and then hold short of F.Ground changed their mind and said Airbus gives way to you; proceed on B and hold short of F. Then ground asked if we were cleared in to the gate. I stated after 2 outbound aircraft out of the alley we were cleared into the gate. They said okay go F and A and hold short of your alley until you can get in. We taxied from B and took a left on F and a second left on A and held short of the alley while a company aircraft exited the alley. After they were clear we turned right into the alley and into the gate. We followed all of these instructions as stated.Upon reaching the gate; the captain received a phone call from the tower stating we did not hold short of the taxiways we were told to on the way in. We in fact held short of G when asked and also held short of F and the ramp as we were told or until we were told otherwise. The controller also said on the phone; according to the captain; that we were originally told to turn left onto B after exiting the runway. If the case; I did not hear nor read back the instruction to turn left onto bravo.I believe we followed the instructions as they were issued. Some factors though that may have contributed to any deviation that occurred according to the controllers could've been misinterpretation of the taxi instructions on our part or ATC forgetting what instructions they gave us. It was the last leg of days of work for me so fatigue was starting to set in. I could have missed an instruction issued by ground and as a result did not read back the correct instructions and was also not corrected by the controller.It is important to listen to all instructions closely as they are given and confirm them if any doubt exists. There were a number of distractions including talking to ground/tower; calling the ramp to find out the status of the gate; completing the after landing flows/checklist; and most importantly keeping a heads up awareness outside the aircraft especially in a designated Hotspot.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.