@EvaEvtimova wrote:
Should we deduct these expenses in a tax return for 2019?
No, they should be (or have been) deducted in 2018 if the corporation is an accrual basis taxpayer because that is when the obligation (expense) was incurred.
See https://quickbooks.intuit.com/r/bookkeeping/cash-vs-accrual-accounting-whats-best-small-business/
