I have used vs I used

I have used their services before; they do a really good job.

I have used grocery lists my entire life; if I didn’t have one, I wouldn’t remember what I needed to buy.

I have no idea how much of my monthly data I have used so far.

So far, I have used over-the-counter allergy medication for my pet allergies, but it hasn’t been working very well, so I would like to get a prescription for more effective medication.

Although I am not proud of it, I have used the internet to cheat on online tests before.

I have used simple language to describe my research so it is accessible to a wider audience.

How can I tell how much of my phone’s storage I have used?

I prefer to use my own pictures or imaginary landscapes as references for my paintings, but I have used pictures and paintings I have found online as references before.

I have used up all of my coupons for the grocery store.

I have used PayPal before, but not in a while.

I don’t have much experience creating content for social media platforms, but I have used Instagram to promote my previous company’s content before.

It appears that I have used up all of my good luck.

Can my visit be counted if I have used up a reward or offer within the same transaction?

This list contains names I have used in writing projects, and ones that I want to use. (These are not for the same project).

After I have used Plantur 21 #longhair Booster, can I use styling products such as hairspray or dry shampoo? Yes, but wait a little until the booster has had a chance to work.

I have used a range of electrical components to help to make a variety of circuits for differing purposes. Furthermore, I can represent my circuit using symbols.

Hi, can you help me, I know at the end is for location and period, but in my sentence, I have used in the end. Is it that very wrong?

However, after 30 minutes, I forgot whether I have used "area (geodesic)" or "area" to compute the area. I was wondering whether there is someone with the lecture notes…

A site address I have used regularly no longer opens with Firefox, I get the message that the page does not exist.

What happens after I have used 12 gas cylinders on the Sparkle Saver's Plan? Once you have used 12 gas cylinders in less than a year you will not be able to reverse the process.

I have used Prettys for many years and would never think of using anyone else.

I have used up all of my lancets, what do I do? If you have used all of your lancets and have not managed to fill the sample tube, send a message to the administrator.

For whatever reason, I have used up 80% of my Mobile Data usage by 27-04-2020 since it stated again afresh on 24-04-2020.

I have used a form template and made edits. How can I create a word document or pdf of the form for review purposes?

This is really helpful in understanding the difference between these two words that I have used interchangeably on many occasions.