Can I claim 9 for a quarter/3 months, and then go back to my original withholdings? I am in financial distress.

[kenjames22_-]

What months and day is the end of each quarter?

[Critter]

You can ... but it may have undesired results on the return later. 

[SweetieJean]

and, starting 1/1/2018, Personal Exemptions go away.
<a rel="nofollow" target="_blank" href="https://www.irs.gov/newsroom/irs-statement-withholding-for-2018">https://www.irs.gov/newsroom/irs-st...>

[kenjames22_-]

I figured as much, however I just got out of nursing  school and it's going to take me a minute to get where I need to be. Playing catch up!