Having confessed that I got tattoos that reflected my sinful past life when I was a teenager, should I refrain from receiving the Eucharist until they are removed?
Forgot to ask the Priest this, may not see him until after Mass. Should I wait and talk to him?
Nobody is required to go to extraordinary or near-impossible means, so provided you have repented, confessed and received sacramental absolution, do not refrain from receiving the Holy Eucharist.
However, a little common sense in approaching Our Lord:
1 - If you believe the tattoos are sinful, keep them covered in public.
2 - When you are able to do so without causing financial harm to you or your family, have them removed or covered up with something more appropriate.
I ran into this problem even with an appropriate tattoo. I was a young traditionalist at the time, about 100 pounds lighter, and a lot more poor. So I got a middle-quality tattoo of St Louis.
The problem is that over the years I lost the photo of the original, and despite multiple google searches was never able to find the photo or drawing again. So it became too faded and stretched and needed to be redone, I ended up having to get it covered over.
Thus St Louis is now St Michael.