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Convert to Business IG account 
Convert your personal IG account to a business IG account 
Update to Business account 
Step 1:
Go to your instagram profile and tap below icon in the upper right corner
Step 2: Tap below Settings icon> Account > Switch to Professional Account

Some accounts "Switch to Professional Account" will be listed directly under Settings.
Step 3: Select your business Category > Done > OK
Step 4 : Tap Business > Next
Step 5: Add Contact/ Don’t use my contact info to skip
Step 6: Business IG account converted!