Where do I enter late tax payments on a late return - they were made without an extension?

TurboTax platform:

Desktop

Background info:

My bookkeeper failed to turn in my tax returns from 2018 to 2021.  However, the IRS received check payments.  They assigned tax years to the checks that didn't have a year written on them.  I'm self-preparing for 2019 onwards.

Questions:

1. Can I report these late payments on my tax returns?
2. If I can report them, where do I enter them on the returns?
3. If I can't, will the IRS credit them automatically or will I have to file and then amend?

Thank you all.