If I wait until after feb 15 2018 to file my return, will the irs still hold my return? I claimed eic and ctc

You can always file it now and your return will be ready for them the second they start processing these held returns. They may even start sooner, so best to be in line!

NOTE: Any returns that include Earned Income Credit and/or Additional Child Tax Credit will also be held until around mid-February. And refunds from those returns will start releasing in late February.

From <https://ttlc.intuit.com/questions/4158238-why-did-i-get-an-email-saying-my-documents-were-ready-but-when-i-log-in-to-finish-my-return-they-re-not-ready?jump_to=similar-questions> 

[edited 2.1.2018, 12:30pm]