For Accounts Payable technicians, the following T-codes are recommended:
F-43 -Enter Vendor Invoice
F-41 -Enter Vendor Credit Memo
FB08 -Reverse Document
MB01 – Enter Goods Receipt (part of 3 Way Match Process)
MB03 -Display Goods Receipt
MIRO -Enter Vendor Invoice (part of 3 Way Match Process)
FBL1N -Display Vendor Line Items
F.98 -Accounts Payable Reports
F110 -Check Run – Multiple checks
F-58 -Hot Check
FCHN -Display Check Register
There are a lot of reports for all the modules in SAP, so try this t.code SAP1. This will open a report selection easy access screen, so you can go module wise reports here.
SAP1 is SAP Easy Access Menu for Report Selection
SAP2 is SAP Easy Access Menu for Info Catalog
SAP SIMPLE Docs 