Is there way to create a test account so that I can checkout the product and also test the abandoned products through api.
previsouly I had the store (http://empty560-2.myshopify.com) which was able to checkout the details and also to abandoned the products. But now It shows me a error page like "Checkout System disabled: Merchant's trial period expired."
Nick here from Shopify.
Great question, this message normally pops up when you have exceeded the limit of orders allowed on a development store. I checked with someone on our team and you would need to choose a plan as a next step here. You can, however, process an unlimited amount of test orders by using the REST Admin API. You can find out more about development stores from the document Shopify has on them here.
Hope this helps and answers your question.
All the best, Nick