This works. However, if it is extremely formal in nature, you might put it in the form of a question (request). In case I have more questions, may I take the liberty of contacting you again?
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Hotmale"In case I have more questions, I will take the liberty of contacting you again"It sounds somewhat rude to me. It says that I will purposefully bother you again with more questions if I need to.
HotmaleIt's sometimes difficult to sound polite in a foreign language.Or even in one's own language.
Hotmale"In case I have more questions, I will take the liberty of contacting you again"This expression is formal but not polite, sounds like the way policemen address themselves to suspects.