Hi @Amirhossein Roshanzadeh , welcome to the Atlassian Community and thanks for your question.
The screenshot you are sharing is from a Jira Service Management customer portal.
If you are enabled to the equivalent Jira instance, https://testo-web.atlassian.net/jira , you should be prompted to sign in here. If you can't access Jira, please reach out to the IT support team in your company to help.
Best regards
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