There are a few ways to keep track of where to start the tape. This guide contains tips for finding the end of tape.
To keep from losing the end of postage tape, place a paper clip on the sticky side of the tape just below where you are making the cut. Store the tape with the paper clip, and you are ready to go next time you need to use the tape. The paper clip is easy to pull off and thick enough to keep from losing the end of the tape.
By hate litter from NC
The paper clip is the first thing I got my hands on when this idea popped into my head. A popsicle stick works even better. You just need something to hold that tape up so when you make the cut, the tape won't fall back down and stick.
In the past I have held it with my finger, then folded a corner on the end but my problem was sometimes I would lose the end before I could make the fold.
I use a single edge razor blade to keep the end of the tape easily available and then the tape can be cut without hunting up scissors! (Not good for young kids.)
I learned the fold over trick eons ago when I worked in an industrial shop. We used all kinds of tapes (duct, teflon, electrical, etc) and the guys were strict about it. Anyone who forgot was ragged unmercifully LOL. Doubt they would have changed and I am too old to now but I like your paper clip idea. :)
Take an old credit card or hotel key, cut it 1/2 inches and use as a tongue to secure the tape from sticking to itself. You will be able to use the plastic tongue to pull the tape out easily.
Put a paper clip at the start of the tape. When you need some, take your length and then put the paper clip in place before tearing it off! Now you'll always know where the end is!
Have you ever spent too much time looking for the end of your tape roll, very frustrating! Just break a bread tag in half or use a paper clip and attach on to the end of the tape roll, no more hassles.
Need help finding the end of packaging/scotch tape? Place a toothpick under the end. It will be easy to remove and replace with no tape wasted.
If you find it hard to locate the end on packing or strapping tape, place a thin ribbon or string under the last portion where you removed tape from roll.