My wife currently owes $6800 for 2015/2016 is on a pymt plan. This year we are owing another $6700 are we still able to set up another payment plan?

My wife and I filed married but separately the last 2 yrs and my wife currently owes $6800 for 2015/2016 is on a pymt plan.2017 we are filing jointly and will be owing another $6700.Are we still able to create a payment plan? or will the IRS not allow us to since now we will be owing $13,500

Also, if they do let us make a payment plan will they put a lien on our bank accounts or do wage garnishments or how does this work