From 22.02.2021, every person regardless of nationality, entering Lithuania must register in the Lithuanian system. This also applies to professional drivers. After registration, you will get a QR code, which will have to be shown when requested by the inspection services.
Registration link: https://keleiviams.nvsc.lt/en/form
Not registering before entering the country can be fined from 500 euro to 1500 euro.
What about the COVID-19 test and mandatory quarantine?
The requirement to have a negative COVID-19 test result and a mandatory 10-day quarantine that applies to all those entering Lithuania in any way (excluding transit) does not apply to transport workers.