@Alan1001 A simple Excel spreadsheet is more than adequate IMO.
I keep a spreadsheet with an entry for each rental, the number of days rented, the amount paid to me, the amount paid in taxes and the amounts taken by AirBnB for fees.
My partner keeps a spreadsheet of repairs, contractor's fees and materials purchased to support the property. Date, amount, what was done/purchased.
These are all things that are useful when filling out the Schedule E. Review that IRS form and the instructions to learn what to track.
Talk to your accountant.
