My anaconda version is 1.9.12 and Python is 3.8.3 but when I want to install tensorflow I get a problem
open cmd and write  pip install tensorflow
or in anaconda prompt write conda install tenorflow
UnsatisfiableError: The following specifications were found
to be incompatible with the existing python installation in your environment:
Specifications:

tensorflow -> python[version='3.5.*|3.6.*|3.7.*']

Your python: python=3.8

If python is on the left-most side of the chain, that's the version you've asked for.
When python appears to the right, that indicates that the thing on the left is somehow not available for the python version you are constrained to. Note that conda will not change your python version to a different minor version unless you explicitly specify that.