Happy to help out. If you'd like to track capital contributions or investments in QuickBooks Online, you'll need to setup an equity account. I've outlined this process for you below. You'll be a pro in no time.
Go to Settings ⚙, then Chart of Accounts.
From the Account Type drop-down, choose Equity.
In the Detail Type drop-down, pick Owner's Equity or Partner's Equity depending on your situation.
Your comment regarding capital gains/owener's equity with regard to the Chart of Acconts was very helpful. I am now faced withe the Turbotax delima. Turbotax asks what the account is used for and provides a dropdown list to choose the item that matches. This is where I encounter my problem. I do not recognize a category that maps to capital investment or owner's equity. I believe assigning a tax line map in Quickbooks might resolve this issue, but what tax line map item do I choose.
The company is an S Corp.
No sales or generated income
All money to operate the business is from me as capital contributions. All money (contributions) are used to pay for internet, telephone, turbotax business, and of course office expenses like paper, ink etc. The business operates out of my home.
You can follow the same steps provided by @Michael K above. I also suggest consulting your accountant or bookkeeper on how to proceed. They can ensure that the account created works best for you and your business.