Update BlazorUI-3_3.md

docs/en/Migration-Guides/BlazorUI-3_3.md

@@ -2,8 +2,12 @@
 
 ## Startup Template Changes
 
-TODO
+* Remove `Volo.Abp.Account.Blazor` NuGet package from your `.Blazor.csproj` and add `Volo.Abp.TenantManagement.Blazor` NuGet package.
+* Remove the ``typeof(AbpAccountBlazorModule)`` from the dependency list of *YourProjectBlazorModule* class and add the `typeof(AbpTenantManagementBlazorModule)`.
+* Add `@using Volo.Abp.BlazoriseUI` and `@using Volo.Abp.BlazoriseUI.Components` into the `_Imports.razor` file.
+* Remove the `div` with `id="blazor-error-ui"` (with its contents) from the `wwwroot/index.html ` file, since the ABP Framework now shows error messages as a better message box.
 
 ## BlazoriseCrudPageBase to AbpCrudPageBase
 
-Renamed `BlazoriseCrudPageBase` to `AbpCrudPageBase`. Just update the usages. It also has some changes, you may need to update method calls/usages manually.
+Renamed `BlazoriseCrudPageBase` to `AbpCrudPageBase`. Just update the usages. It also has some changes, you may need to update method calls/usages manually.
+