1. Boxed in order, small receipts stapled to a sheet of A4. Check receipts thoroughly before putting in box to make sure they have a VAT number and are proper VAT receipts. Each receipt was numbered in order to match the spreadsheet.
2. 385
3. Spreadsheet
4. No stress, my partner did it.
5. No
That was back in 2018, things have changed now I think.