It is hard to say for sure how a Government Shutdown on 2/8/18 will affect the IRS. Fortunately, if you E-File your taxes, most of the process is automated, so it shouldn't be affected too much. However, people who choose to mail their Tax Returns could face significant delays because processing of paper filed returns would come to a complete halt.
Check out this article for some interesting reading on the possible effects of a Government Shutdown on the IRS:
How Would Government Shutdown Affect the IRS?
