The deadline to verify and allocate your purchases for the tax year ended 31st December 2020 is the 25th February 2021. This will ensure that you are granted the maximum rebates per category for the tax year of 2020.
The tax office has released a very user friendly application for iOS and Android for free called E-Fatura. We highly recommend that you download the app and regularly verify/allocate your invoices throughout the year.