Following the agreement of all German states and the Federal Government, largely identical regulations to combat the corona pandemic will come into force nationwide from Monday. These are initially limited until 30 November.
These will lead to a so-called "lockdown light": almost all facilities for entertainment and leisure activities and all gastronomic establishments (except for takeaway sales) and all tourist accommodation will be banned.
In addition, a quarantine of 10 days will be mandatory from tomorrow on when entering the country from risk areas (including the Czech Republic). This can hardly be shortened: only after 5 days a corona test may be carried out, which will end the quarantine if the result is negative. As you normally have to wait at least 2 days for the result, you can shorten the quarantine by a maximum of 3 days.
All regulations in detail can be found in our overview of the corona rules in Saxony and the Czech Republic.