It will be the first time Estonia, home of reigning world champion Ott Taenak, has featured on the WRC calendar. The short-format gravel rally based around Tartu is scheduled for Sept. 4-6.
The revised schedule published on Thursday sees Turkey following on from Estonia on Sept. 24-27.
Germany's round will be on Oct. 15-18, with Italy (Sardinia) on Oct. 29-Nov. 1 after being postponed from June while Japan is scheduled to end the season on Nov. 19-22.
Rallies in Belgium and Croatia could also feature with talks ongoing.
The championship completed three rounds in Monte-Carlo, Sweden and Mexico before the new coronavirus sent countries into lockdown.
Six times world champion Sebastien Ogier leads the standings for Toyota.
"Today’s restart announcement sends a clear signal that the 2020 WRC is back in business," said WRC promoter managing director Oliver Ciesla in a statement.
FIA rally director Yves Matton said he was confident there would be a minimum of eight rallies this year. (Reporting by Alan Baldwin, editing by Toby Davis)