Good to see you back! And great going for only putting on a few lbs. You'll have those lbs off in no time at all.
I think 1600 calories would be a good place to start. You can see how you feel on that and if need be, you could raise it up a tad. You'll also see how the weight loss is going. And make adjustments as needed.
But make sure that you get the utter most from your calories. Make it foods that will
satisfy you and NOT leave you hungry. Low fat proteins. Lots and lots of fiber filled veggies and fruits. The pastas, floury, sugary stuff, ALWAYS leaving me wanting for more and hungry after a short while. So I avoid those.
Also do your best to spread your calories throughout the day. Never letting yourself get a chance to be hungry. Eat often. Every 2 - 2 1/2 hours or so.
Good luck to you. And WELCOME BACK!!