Is there anyway to override the needed by dates on the inquiry screen?

Check in and check out dates are required in order for an inquiry to be saved. Once the initial inquiry is submitted, the dates can still be edited if they need to be changed:

As a reminder, you can only edit inquiry dates for a direct inquiry. Inquiries that come through channel integrations usually cannot be changed in MyVR. Refer to our Channel Cheat Sheet guide for more details per channel.