Hi,
Hope you are doing well !!
No, you cannot file for refund of multiple tax period in one refund application. Taxpayer needs to select the tax period for which refund is to be claimed. If a taxpayer has to file multiple refund applications for multiple reasons, then the taxpayer needs to file multiple refund applications using “Any Other” reason and specify the reason of refund in the refund application. Taxpayer cannot not file multiple refund applications for a single reason.
Yes, you can upload FIRC/Invoices everything via Online.
