When creating a Finish Line task, you will need obtain the product ID, style ID, and color ID.
To get the product ID, style ID, and color ID you will need to click a product.
Then, click and highlight the link in search bar. This link has all of the components you need to get your full SKU (product ID, style ID, and color ID).
Copy that product ID that comes after the product details, the style ID, and the color ID (here the product ID is prod2783440, style ID is AQ8810, and color ID is 201).
SKUs are formatted as so PRODUCTID:STYLEID:COLORID. So, your SKU is prod2783440:AQ8810:201.
Select Finish Line as the site, and paste the SKU into the URL/SKU field.
Then, choose a size or use full size run (see this "How to use full size run" article if you have questions), then choose a quantity or number of tasks you want to create, and then choose a profile. If you would like to use random email and random name on that task, select those options (MAKE SURE if you use random email you have a catchall without an @ in your profile's email field). Select task specific proxy if you want, it is not recommended unless you need it.
Proxies:
Both Residential and/or Datacenter proxies work on Finish Line, but most Datacenter proxies are now banned.
Delays:
Mid to high delay for drops is recommended because Finish Line bans hard, so 2500 - 7500 ms is recommended.
Setup:
Finish Line is queue based, so the more tasks the better. Finish Line does ban so go at least 1:1 in terms of tasks to proxies, and as close as you can get to 1:1 in terms of credit cards/unique payment information to tasks. Start less than 10 seconds before the drop starts.