If I owed taxes on a return and had my refund withheld, can I still amend that year?

[sam_something]

I was overpaid about $3500 on taxes for 2016 due to failing to report one of my W-2s.  That money was withheld from my 2018 tax return.  I recently discovered I am eligible to claim my 4 nephews ho lived with me for 2016.  It turns out I am actually owed an additional $1000 after I amended my 2016 return, on top of what I originally received, so I no longer would owe the $3500.  Will I also be refunded the $3500 that was withheld along with the $1000 I am still owed?

[Critter]

First you must change the original return   and get it exactly as the Irs changed it...only then can you start the amendment process. Line 18 could be tricky if it does not follow what the its said so manual correction may be required. Then after amending any refund would be on line 22.