I need help in uploading my cvs files from my computer to quick books

I'll help you upload your data to QuickBooks Online (QBO) using the Excel CSV files, @matty2.

Before we start, can you share with me more information on what type of transaction you're trying to import? This way, I can provide you the appropriate steps in uploading your CSV files into QuickBooks.
 

If you're trying to import your bank transactions, then you can follow these steps: 
 

1. From the Banking menu and select Banking.
2. Click File upload. If you’ve never connected an account, you can select Upload transactions manually. 
3. Continue by clicking Browse and choose the file you downloaded from your bank. 
4. Select Open, then click Next.
5. From the QuickBooks Account drop-down list, select the bank or credit card account then select Next.
6. Choose a Date, date format, Description, and Account. Then, click Next.
7. Check the boxes for the transactions you wanted to import and select Next.
8. Once done, click Yes and select Let's go! when the Import completed notification appears.

However, if you're trying to bring any of your existing data into QuickBooks, simply click these links:
 

• Customer
• Vendors 
• Products and services
• Invoices
• Chart of Accounts

In addition, I've included an article which is composed of frequently asked questions about importing data into QBO: Common questions about importing data to QuickBooks.

I'm always here to help if you have any other concerns or questions. Just tag my name in the comment section and I'll get back to you as soon as I can. Have a great weekend.