Most wage replacement benefits are not found in the employer's income tax statement. These include according to § 32b EStG:
All tax-free benefits not listed in § 32b EStG are also not subject to the progression clause and therefore do not need to be declared in the tax return. This includes unemployment benefit II (Hartz IV).
Note: The "Corona Tax Assistance Act" made employer subsidies for short-time work benefits and seasonal short-time work benefits tax-free, provided they did not exceed 80 percent of the difference between the target income and the actual income together with the short-time work benefits. This regulation initially applied from 1.3.2020 to 31.12.2020. The tax exemption for employer subsidies for short-time work benefits was then extended until 30.06.2022. The employer subsidy has been taxable again since July 2022.