How to put in the left align on the product page?

Hi @VisarK , thank you for posting here!

You can follow my instruction below:

Step 1: Online Stores > Themes > More Actions > Edit code

Step 2: Asset folder, open the base.css → place the code below at the very bottom of the file.

#shopify-section-template--22723455385903__main {
    text-align: left;
}
.product-form__input .form__label {
    text-align: left !important;
}
.product-form__input .quantity {
    margin-left: 0;
}

If my answer is working for your store, please let me know by accepting Solution and giving Like !!!