You also might require your tax professional to kick the can down the road with IRS collections to 2016 as well - to prevent any collection activity against you. But if you are receiving just the LT11, CP504 letters from the IRS collection branch, your timing could be perfect...
You file your Offer in Compromise at the end of December. By the time it's accepted in the Spring, you will be current on 2016 taxes. At least - this is how it should work in theory :)
Owing taxes for 2015? Owing back taxes too? Call us at 1-888-282-4697 or EMAIL us your tax situation HERE and we'll contact you! Thank you, Staff of Washington Tax Services - solving tax problems for Americans since 1989. That's 26 years :)