You can generate a single PDF of multiple tax receipts for printing from the receipt object. First you will want to create a custom list view of the receipts you want to print.
Print receipts from receipt object
1 - Select the custom list view
2 - Select the records you want to print receipts
3 - Select print receipts button.
Documents folder - Saved PDF
When you print receipts from the list view on the receipts object a copy of the PDF is saved in the document object under the Tax receipts folder.