Instead of specifically telling you which are the fields of AS, let me guide you re: how to go about finding info.
The internal tables use a pre-defined structure usually. The internal table name would be something (eg. AS) but it uses a defined structure of another name.
Go to SE38 and display your payroll pgm RPCALCx0 where x depends on your molga.
Look for “table as”. The find where its defined.
I can see AS uses the structure PCAL_AS. Then double click on PCAL_AS. It will route you to the structure In Repository info system.