Other smaller and larger expenses incurred during off-site work are also included in deductible travel expenses. These costs can be deducted to the proven amount. If proof is not possible, you can also provide credible evidence of the expenses and estimate the amount.
For some additional costs, you will not have received any receipts or may not have kept them (e.g. for tips, luggage storage, business calls, loss, theft).
In this case, a self-issued receipt can help to provide credible evidence: Note down the type and amount of the expenses, the place and date on a sheet of paper and confirm the details with your signature.
